I bought some disposable shot glasses from asda, when my pg vg or nic bottles go below the reach of the syringes, I decant a shot glass full of each out to make it easy to suck up with a syringe, one quid for 30
I'm with Diche and Dagger on bases, I decant from the 1 litre bottles when mixing and draw them straight into the syringe. I don't use needles if I'm looking for accuracy, but they're great for filling some atties and for draining the last ml out of juice bottles.